ATE360250T1 - LOW BIT RATE AUDIO ENCODING - Google Patents

LOW BIT RATE AUDIO ENCODING

Info

Publication number
ATE360250T1
ATE360250T1 AT03764416T AT03764416T ATE360250T1 AT E360250 T1 ATE360250 T1 AT E360250T1 AT 03764416 T AT03764416 T AT 03764416T AT 03764416 T AT03764416 T AT 03764416T AT E360250 T1 ATE360250 T1 AT E360250T1
Authority
AT
Austria
Prior art keywords
low bit
quantized
rate audio
bit rate
audio encoding
Prior art date
Application number
AT03764416T
Other languages
German (de)
Inventor
Mark Stuart Vinton
Michael Mead Truman
Original Assignee
Dolby Lab Licensing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Application granted granted Critical
Publication of ATE360250T1 publication Critical patent/ATE360250T1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The perceived quality of an audio signals obtained from very low bit-rate audio coding system is improved by using expanding quantizers and arithmetic coding in a transmitter and using complementary compression and arithmetic decoding in a receiver. An expanding quantizer is used to control the number of signal components that are quantized to zero and arithmetic coding is used to efficiently code the quantized-to-zero coefficients. This allows a wider bandwidth and more accurately quantized baseband signal to be conveyed to the receiver, which regenerates an output signal by synthesizing the missing components.
AT03764416T 2002-07-16 2003-07-08 LOW BIT RATE AUDIO ENCODING ATE360250T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/198,638 US7043423B2 (en) 2002-07-16 2002-07-16 Low bit-rate audio coding systems and methods that use expanding quantizers with arithmetic coding

Publications (1)

Publication Number Publication Date
ATE360250T1 true ATE360250T1 (en) 2007-05-15

Family

ID=30115160

Family Applications (1)

Application Number Title Priority Date Filing Date
AT03764416T ATE360250T1 (en) 2002-07-16 2003-07-08 LOW BIT RATE AUDIO ENCODING

Country Status (15)

Country Link
US (1) US7043423B2 (en)
EP (1) EP1537562B1 (en)
JP (1) JP4786903B2 (en)
KR (1) KR101019678B1 (en)
CN (1) CN100367348C (en)
AT (1) ATE360250T1 (en)
AU (1) AU2003253854B2 (en)
CA (1) CA2492647C (en)
DE (1) DE60313332T2 (en)
IL (1) IL165869A (en)
MX (1) MXPA05000653A (en)
MY (1) MY137149A (en)
PL (1) PL207862B1 (en)
TW (1) TWI315944B (en)
WO (1) WO2004008436A1 (en)

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Also Published As

Publication number Publication date
MY137149A (en) 2008-12-31
IL165869A0 (en) 2006-01-15
DE60313332T2 (en) 2008-01-03
TWI315944B (en) 2009-10-11
CN1669072A (en) 2005-09-14
AU2003253854B2 (en) 2009-02-19
US20040015349A1 (en) 2004-01-22
JP4786903B2 (en) 2011-10-05
CN100367348C (en) 2008-02-06
US7043423B2 (en) 2006-05-09
IL165869A (en) 2010-06-30
EP1537562B1 (en) 2007-04-18
MXPA05000653A (en) 2005-04-25
CA2492647C (en) 2011-08-30
CA2492647A1 (en) 2004-01-22
DE60313332D1 (en) 2007-05-31
KR20050021467A (en) 2005-03-07
HK1073916A1 (en) 2006-01-20
WO2004008436A1 (en) 2004-01-22
PL373045A1 (en) 2005-08-08
EP1537562A1 (en) 2005-06-08
AU2003253854A1 (en) 2004-02-02
PL207862B1 (en) 2011-02-28
TW200406096A (en) 2004-04-16
KR101019678B1 (en) 2011-03-07
JP2005533280A (en) 2005-11-04

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